Tenacity
-
Brittle
Solubility
-
Dilute acid
Durability
-
-
Specific Gravity
2.92.93-2.96
1
7.18
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Fracture
Conchoidal
Subconchoidal, Conchoidal
Cleavage
{???} Indistinct
Distinct on {010}, imperfect {110} and {011}
Mohs Hardness
4.53.5-4
2
10
👆🏻
Chemical Composition
(Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references